SMLIGHT PoE Splitter 100Mb – USB-C 5V Power from PoE

Product detailed description

A PoE splitter that turns a network cable into power ⚡

The SMLIGHT PoE Splitter 100Mb is a compact PoE to USB-C splitter that splits a single network cable into two things at once: clean 5V power and a regular 10/100 Mbps data connection. On the input it expects standard PoE to IEEE 802.3af/at (44 – 57 V); on the output you get an RJ45 connector for data and a USB-C connector that powers a device with no PoE support of its own.

In practice this means you can put a coordinator, gateway or small IoT board exactly where the radio reach is best or where it hides most neatly – in a cabinet, in the attic, behind the TV, above a suspended ceiling – without running a mains socket there. One UTP cable from your PoE switch is enough.

How a PoE splitter works and what you get

A PoE splitter does exactly the opposite of a PoE injector. An injector puts power onto the cable; a splitter takes it back off. This model requests power from the switch through automatic PoE negotiation – the switch first recognises that a legitimate PD device is on the far end, and only then sends 48 V down the cable. There is no risk of voltage reaching a port that is not expecting it.

Inside, the voltage is stepped down to a steady 5 V at up to 1 A (5 W) and delivered over USB-C. Data travels on a completely separate branch to the RJ45 connector at 10/100 Mbps. Between the power and data sides sits 2.5 kV galvanic isolation, which protects the connected electronics from surges and ground loops – worth having on runs between buildings or on long industrial cable routes.

The splitter handles both common ways of carrying power in the cable: data on pairs 1/2 (+) and 3/6 (−), power on pairs 4/5 (+) and 7/8 (−). You don't need to worry about which PoE switch you own – it works with any standard 802.3af and 802.3at source.

Most customers buy it for smart home coordinators and gateways. If you are still choosing the coordinator itself, have a look at ZigBee hubs and coordinators – some models, such as the SMLIGHT SLZB-MR1, have PoE built in and don't need a splitter at all. For a USB dongle, a mini board or an older adapter without PoE, this PoE to USB-C adapter is the cheapest way to get them onto a single cable.

Who this PoE splitter is for

• Home Assistant and Zigbee2MQTT users who want the coordinator further from the server, in a spot with better radio coverage.
• Homes with a PoE switch or UniFi infrastructure, where pulling a network cable is easier than adding a socket.
• Renters and renovations, where touching the electrical wiring isn't possible or wanted.
• Installers and small business networks that need to power small IoT parts in a cabinet without extra adapters.
• Makers using ESP32, Raspberry Pi Zero and similar boards drawing up to 5 W.

Typical use cases 🔌

• Powering a Zigbee coordinator over a network cable – place the adapter in the middle of the house, where its reach is best, with no socket needed.
• PoE power for a non-PoE device in a rack – a gateway, converter or module runs off the same switch as the rest of the network.
• Hidden installs behind a TV or above a ceiling – one cable instead of a cable plus a mains adapter.
• Powering IoT devices in a garage, workshop or loft, where there is no socket or it is already taken.
• Temporary and test setups – move the device wherever the network cable reaches.
• Fewer adapters around the home – one PoE switch replaces several small power bricks.

Key features and specifications

Why choose the SMLIGHT PoE Splitter 100Mb

• One cable instead of two. Data and power both arrive over the UTP cable – no socket at the installation point.
• Safe connection. 2.5 kV isolation and automatic PoE negotiation protect both the connected electronics and the network.
• Universal USB-C output. Works with anything normally powered over USB-C at 5 V up to 1 A – not just SMLIGHT devices.
• Tiny and silent. No fan, no display, nothing to configure – plug it in and it works.

If you need the opposite job – getting power onto a network that has no PoE. And if you are still choosing the coordinator itself, both the SMLIGHT SLZB-06p7 and the SLZB-MR1 have PoE built in – the splitter pays off with devices that don't.

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